//Random -function, timer method
//
//Timer_A is setup in capture mode. SMCLK is set to the
//DCO and set as the input clock to Timer_A. ACLK
//is set to the VLO, which is the trigger for the capture.
//Timer_A counts the number of DCO clock pulses
//before the next VLO low-to-high transition occurs.
//The number of DCO clock pulses is saved by the timer
//in a Capture/Compare Register (CCR).

int randomize_led(){

    while(1){

    BCSCTL2 &= ~(DIVS1 + DIVS0);            // SMCLK / 1 (subsystem clock)

    TACCR0 = 0;

    TACCTL0 = CAP | CM_1 | CCIS_1;            // Capture mode, positive edge/ aclk input
    TACTL = TASSEL_2 | MC_2;                  // SMCLK, continuous up


    while (!(CCIFG & TACCTL0));       // Wait for interrupt

    TACCTL0 &= ~CCIFG;                // Clear interrupt

    result =  TACCR0;

    result = result & 0x0007;               // bit masking the result to 3 bits


    BCSCTL2 |= DIVS1 + DIVS0;               // SMCLK / 8 (subsystem clock)
                                            // set SMCLK back to 125KHZ

    if(result > 6){

        result = 6;

    }

    if(result < 1){
        result = 1;
    }

        if(result != prev_result){
            prev_result = result;
            return result;

        }

    }

}